Решите уравнения: -5(5-х)-4х=18 5,4(3х-2)-7,2(2х-3)=1,2

Question

Решите уравнения:
-5(5-х)-4х=18
5,4(3х-2)-7,2(2х-3)=1,2

Answer 1

1)
-25+5х-4х=18
-25+х=18
х=18+25
х=43

2)
16.2х-10.8-14.4х+21.6=1.2
1.8х+10.8=1.2
1.8х=1.2-10.8
1.8х=-9.6
х=-9.6÷1.8
х=-9 3/5÷1 4/5
х=-48/5÷9/5
х=-48/5×5/9
х=-16/3=-5 1/3